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Control and monitoring software of LHAASO DAQ

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Radiation Detection Technology and Methods 2022年第2期6卷 227-233页

作者： Zezhong Yu kejun zhu Minhao Gu Fei Li MoHan Zhang State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China School of Nuclear Scicnce and Technology University of Chinese Academy of SciencesBeijing 100049China Tianfu Cosmic Ray Research Centre Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China

Purpose The Large High Altitude Air Shower Observatory(LHAASO)is a hybrid extensive air shower(EAS)*** consists of 3 types of detector arrays and about 9500 detector units in *** information generated by data acquisition system(DAQ),including signal count rates of detectors,is stored temporarily in Redis and updated *** is an open-source in-memory *** control interface of DAQ's data flow software is also based on *** to the monitoring and control requirements,status data from DAQ system need to be *** status of data flow software and detectors should be *** automatic operation mode,common software and hardware faults should be detected and recovered *** Status information collection,analysis and automatic operation control are implemented in multiple *** information collection programs collect the operation status data from the DAQ and monitor the operation status of the computing *** information is cached in *** is an open-source distributed event streaming *** DAQ data flow controller program obtains the status data from Kafka,analyzes the operation status,and tries to recover the fault by modifying the DAQ configuration file and restarting *** this architecture,the automatic control logic can be easily updated by modifying and restarting a single ***,the monitoring data are structured and stored in *** and Conclusions The software can monitor the detectors,electronics and computing nodes in LHAASO,save monitoring data in MongoDB,and control the DAQ data flow *** a fault occurs,it can restart the DAQ data flow *** software meets the auto-control operation requirements of LHAASO.

关键词： LHAASO DAQ Control Monitor

重组结核分枝杆菌Ag85b蛋白原液纯度反向高效液相色谱检测方法的建立及验证

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中国生物制品学杂志 2024年第1期37卷 86-91页

作者：金丽婷黄岳张素勤肖文俊朱克骏张健江秋虹安徽智飞龙科马生物制药有限公司研发中心安徽合肥230088

目的建立检测重组结核分枝杆菌(Mycobacterium tuberculosis,Mtb)Ag85b蛋白原液纯度的反向高效液相色谱法,并进行验证。方法设计4因素3水平正交试验,将面积、拖尾因子、峰面积、峰面积RSD作为评价指标进行分析,摸索最适检测条件,并依... 详细信息

目的建立检测重组结核分枝杆菌(Mycobacterium tuberculosis,Mtb)Ag85b蛋白原液纯度的反向高效液相色谱法,并进行验证。方法设计4因素3水平正交试验,将面积、拖尾因子、峰面积、峰面积RSD作为评价指标进行分析,摸索最适检测条件,并依据《中国药典》四部(2020版)9101药品质量标准分析方法验证指导原则进行专属性、线性范围、精密度、耐用性等验证。结果当检测条件为有机相洗脱比例30%~95%、检测温度35℃、进样量3μg、95%有机相洗脱时间15 min时,各评价指标结果均较好,在该检测条件下线性相关系数(R2)为0.998 5,线性范围为1.8~4.2μg;重复性RSD为0.01%;中间精密度RSD为0.16%;在柱温与流速细微变动下均具有良好的耐用性。结论建立了重组MTBAg85b蛋白原液纯度检测的反向高效液相色谱法,该方法专属性强,精密度、耐用性好,可用于重组MTBAg85b蛋白原液质量控制。

关键词：反向高效液相色谱法结核分枝杆菌 Ag85b蛋白纯度

Global convergent algorithm for the bilevel linear fractional-linear programming based on modified convex simplex method

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Journal of Systems Engineering and Electronics 2010年第2期21卷 239-243页

作者： Guangmin Wang Bing Jiang kejun zhu Zhongping Wan School of Economics and Management China University of Geosciences Wuhan 430074 R R. China School of Mathematics and Statistics Wuhan University Wuhan 430072 R R. China

A global convergent algorithm is proposed to solve bilevel linear fractional-linear programming, which is a special class of bilevel programming. In our algorithm, replacing the lower level problem by its dual gap equaling to zero, the bilevel linear fractional-linear programming is transformed into a traditional sin- gle level programming problem, which can be transformed into a series of linear fractional programming problem. Thus, the modi- fied convex simplex method is used to solve the infinite linear fractional programming to obtain the global convergent solution of the original bilevel linear fractional-linear programming. Finally, an example demonstrates the feasibility of the proposed algorithm.

关键词： bilevel linear fractional-linear programming convex simplex method dual problem.

Review of small aspheric glass lens molding technologies

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Frontiers of Mechanical Engineering 2017年第1期12卷 66-76页

作者： Shaohui YIN Hongpeng JIA Guanhua ZHANG Fengjun CHEN kejun zhu National Engineering Research Center for High Efficiency Grinding Hunan University Changsha 410082 China School of Mechanical Engineering Xiangtan University Xiangtan411105 China

Aspheric lens can eliminate spherical aberra- tions, coma, astigmatism, field distortions, and other adverse factors. This type of lens can also reduce the loss of light energy and obtain high-quality images and optical characteristics. The demand for aspheric lens has increased in recent years because of its advantageous use in the electronics industry, particularly for compact, portable devices and high-performance products. As an advanced manufacturing technology, the glass lens molding process has been recognized as a low-cost and high-efficiency manufacturing technology for machining small-diameter aspheric lens for industrial production. However, the residual stress and profile deviation of the glass lens are greatly affected by various key technologies for glass lens molding, including glass and mold-die material forming, mold-die machining, and lens molding. These key technical factors, which affect the quality of the glass lens molding process, are systematically discussed and reviewed to solve the existing technical bottlenecks and problems, as well as to predict the potential applicability of glass lens molding in the future.

关键词： aspheric glass lens mold-die manufacturing,lens molding molding process simulation

DAQ readout prototype for JUNO

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Radiation Detection Technology and Methods 2021年第4期5卷 600-608页

作者： Tong Zhou Xiaolu Ji kejun zhu Fei Li State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsCASBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Purpose The Jiangmen Underground Neutrino Observatory(JUNO)is a multi-purpose underground neutrino *** 1800020-inch photomultipliers(PMTs)are instrumented in the Central Detector to detect the photons,and the signals will be captured by high-speed high-resolution waveform full sampling *** addition,about 250003-inch PMTs are also instrumented to capture T/Q Hits *** work builds a DAQ readout prototype system for JUNO,which can be used to test the full readout chain for 20-inch and 3-inch *** The system is designed to continuously readout the data flow from multiple electronics channels,check the raw data,and finally save them into ***,the graphical user interface(GUI)provides a real time display of the sampled *** system is developed with the open source Qt *** The design and performance of the system have been verified in detail,particularly by performance test based on Gigabit Ethernet and 10-Gigabit *** A DAQ readout prototype system has been developed for JUNO,which is successfully applied to electronics testing system in Italy and PMT testing system in Guangdong.

关键词： Data acquisition system DAQ readout prototype JUNO

Using a combinatorial auction-based approach for simulation of cooperative rescue operations in disaster relief

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International Journal of Modeling, Simulation, and Scientific Computing 2018年第4期9卷 230-250页

作者： kejun zhu Jian Tang Haixiang Guo Chengzhu Gong Jinling Li School of Economics and Management China University of Geosciences Wuhan 430074 P.R.China

In practice,we experience low efficiency of search and rescue(SAR)frequently in disaster ***,we will optimize the SAR through agent-based *** the kind of cases described here,rescue teams are characterized by different capabilities,and the tasks often require different capabilities to *** this end,a combinatorial auction-based task allocation scheme is used to develop a cooperative rescue plan for the heterogeneous rescue ***,we illustrate the proposed cooperative rescue plan in different scenarios with the case of landslide disaster *** simulation results indicate that the combinatorial auction-based cooperative rescue plan would increase victims’relative survival probability by 13.8–16.3%,increase the ratio of survivors getting rescued by 10.7–12.7%,and decrease the average elapsed time for one site getting rescued by 19.0–26.6%.The proposed rescue plan outperforms the rescue plan based on the F-Max-Sum a little *** robustness analysis shows that the proposed rescue plan is relatively reliable on condition that both the search radius and scope of cooperation are larger than ***,we have investigated how the number of rescue teams influences the rescue efficiency.

关键词： Search and rescue simulation task allocation heterogeneity combinatorial auction.

Measurement of the neutron total cross section of^(9)Be at the Back-n white neutron source of CSNS

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Chinese Physics C 2024年第8期48卷 140-152页

作者： Jiangbo Bai Jingyu Tang Liqun Shi Yonghao Chen Han Yi Jie Bao Yu Bao Ping Cao Haolei Chen Zhen Chen Zengqi Cui Ruirui Fan Changqing Feng Keqing Gao Xiaolong Gao MinHao Gu Changcai Han Guozhu He Yongcheng He Yang Hong Yiwei Hu Hanxiong Huang Xiru Huang Haoyu Jiang Wei Jiang Zhijie Jiang Hantao Jing Ling Kang Bo Li Chao Li Jiawen Li Qiang Li Xiao Li Yang Li Jie Liu Shubin Liu Ze Long Guangyuan Luan Changjun Ning Mengchen Niu Binbin Qi Jie Ren Xichao Ruan Zhaohui Song Kang Sun Zhijia Sun Zhixin Tan Xinyi Tang Binbin Tian Lijiao Wang Pengcheng Wang Zhaohui Wang Xiaoguang Wu Xuan Wu Likun Xie Xiaoyun Yang Li Yu Tao Yu Yongji Yu Guohui Zhang Linhao Zhang Qiwei Zhang Xianpeng Zhang Yuliang Zhang Zhiyong Zhang Luping Zhou Zhihao Zhou kejun zhu Institute of Modern Physics Fudan UniversityShanghai 200433China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China Sate Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China State Key Laboratory of Particle Detection and Electronics Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China

The neutron total cross section data of^(9)Be are essential in the nuclear structure model research of light nuclei and nuclear power *** neutron total cross section of^(9)Be in the 0.3 eV−120 MeV energy region has been measured using time-of-flight and transmission methods with the Neutron Total Cross Sectional Spectrometer(NTOX)based on the multi-cell fast fission chamber at the China Spallation Neutron Source(CSNS)-Back-n white neutron source(Back-n).The fission count-neutron energy distributions of ^(235)U and ^(238)U without samples and with Be samples with three thicknesses were measured in the double-bunch operation mode for a beam power of 100 *** Bayesian method was used to eliminate the influence of the double-bunch problem on neutron measurement in the energy region above 10 *** neutron total cross section of^(9)Be results was consistent with ENDF/B-VIII.0 evaluation library data in the 0.3 eV−20 MeV energy *** the energy ranges of 0.3 eV to 10 keV and 0.01 to 20 MeV,the deviations between our results and the evaluation results of ENDF/B-VIII.0 were within 2.5%and 15%,*** the resonance energy region,the measured resonance energies in our experiment were 0.63,0.82,and 2.8 MeV,*** results showed that the total cross section uncertainties of three Be samples were within 2.2%in the energy region below 1 *** total cross section uncertainty of 30 mm Be from ^(235)U was the smallest and less than 5%in the energy region of 0.3 eV−120 *** results of this experiment can provide technical support for further data analysis and related nuclear data evaluation.

关键词： ^(9)Be neutron total cross section CSNS Back-n time-of-flight method transmission method multi-cell fast fission chamber

Pressure Distinguishes the Dual Emissions in Pseudohalide 2D Ruddlesden-Popper Perovskite Cs_(2)Pb(SCN)_(2)Br_(2)

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CCS Chemistry 2024年第7期6卷 1748-1756页

作者： Songhao Guo Yuhong Mao Congcong Chen Yao Zhang Guoxiang Zhao kejun Bu Qingyang Hu Haiming zhu Guifu Zou Wenge Yang Lingling Mao Xujie Lü Center for High Pressure Science and Technology Advanced Research(HPSTAR) Shanghai Department of Chemistry Southern University of Science and TechnologyShenzhen Department of Chemistry Zhejiang UniversityHangzhou College of Energy Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou

Two-dimensional(2D)Ruddlesden-Popper(RP)halide perovskites with diverse structures and properties have drawn increasing attention due to their promising optoelectronic ***,a new all-inorganic Cs_(2)Pb(SCN)_(2)Br_(2) has been reported that opens up new potential for the development of 2D RP ***,recent reports of unusual dual emissions and two-edge absorption in Cs_(2)Pb(SCN)_(2)Br_(2) have generated intense debate about its origin and remains ***,by combining continuous pressure tuning with in situ diagnostics,we have unambiguously revealed the underlying mechanisms that the 2D Cs_(2)Pb(SCN)_(2)Br_(2) exhibits an intrinsic blue emission at 2.66 eV and an absorption edge close to the emission *** the gradually formed CsPbBr_(3) is responsible for the green emission at 2.33 eV with the absorption shoulder at 2.41 ***,by fitting the temperature-dependent intensity of the intrinsic blue emission,we have determined the corrected value of exciton binding energy for 2D Cs_(2)Pb(SCN)_(2)Br_(2) to be 90 ***,an emission enhancement of 2.5 times is achieved in Cs_(2)Pb(SCN)_(2)Br_(2) under a mild pressure within 0.8 GPa,caused by the pressuresuppressed exciton-phonon *** work not only elucidates the origin of the dual emissions and two-edge absorption in Cs_(2)Pb(SCN)_(2)Br_(2),but it also provides a potential means to regulate and optimize the optoelectronic properties of 2D perovskites.

关键词： two-dimensional perovskite dual emissions two-edge absorption high pressure in situ characterization enhanced photoluminescence

Percutaneous internal fixation with PKP and simple PKP for thoracolumbar burst fractures of the aged patients:A prospective randomized controlled trial

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Percutaneous internal fixation with PKP and simple PKP for t...